Verizon still allows the older metered data plans. They don't always show up on the websites, although they sometimes do and the phone support will always let you add lines to them. They are not forcing anyone off anything but unlimited data.
FWIW, though, I kept unlimited data when I used my upgrade on my single line to buy a moto x for $49 on motomaker. Motomaker doesn't require you to pick a new data plan when using your upgrade, they just give a notice saying you'll lose it. When I got the phone, I tried to activate it via the web, but it was at that point they were forcing me to switch from unlimited at $30/month to 2 GB for $30/month. So I cancelled out of that, took the sim card out of my old phone, trimmed it to the nano size and put it in my moto x, and my account kept unlimited data. Only problem was, my makeshift nano sim card failed after a week. So, I called Verizon to activate the sim card that came with it. At that point I was automatically downgraded to the $30/month 2 GB data plan without them ever actually telling me that. I felt like it was worth a try, and he said yeah that is your only option. I then said that I heard of some people getting 6 GB for $30 a month when switching off unlimited. He said "Oh, I see you are a high data usage customer, you should have been offered that option, I'll switch you to that." I was fine with that, I rarely go over 5 gb in a month. However, when I logged into my account, it shows he switched me back to unlimited.